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what is ratio and what is rounding off numbers

Sagot :

Rounding off numbers is estimating it to the nearest ones,tens, hundreds and thousands (etc.)
Example:
Round to the nearest tens
25
If the number next to 2 is below 5, Change the ones digit to 0
If the number is 5 or above, change 5 to 0 and add 1 to the tens digit
which gives 30.